On: Hospital’s iced water machine purifier stripped out chlorine, killing 3 patients

[andrewflnr]

How does UV reduce chlorine? It's a freaking element. It's especially weird inside an ice machine, where the chlorine can't selectively evaporate or something, which is my first guess at a mechanism in open air.

[gregschlom → andrewflnr]

The UV doesn't reduce chlorine, it kills bacteria. There's also a filter, and that's what removes the chlorine

[andrewflnr → gregschlom]

That's what I would have thought. But the article said:

> Both carbon filters and ultraviolet light are known to decrease chlorine concentrations.

Seems crazy, right? That's why I'm asking.

[midoridensha → andrewflnr]

You expect scientific accuracy from journalists?

[hundchenkatze → gregschlom]

UV purification systems can also remove chlorine.